Wow, Wife with kids? I say have a 2nd car so that when they get bored, they can go shopping or back to the hotel. The hotel is quite a few miles away too. The Mopar lovers here, mainly guys and some girls, can stay there all day at the swap, look at cars, sit at the tent and BS, but usually other family members are going to be saying, "how long before we go?" Then we do the same thing the next day too. I say promise them a "REAL" vacation and leave them at home for your Carlisle week-end vacation, Unless you are ready to not spend lots of time at the event. I went by myself last year and the only thing better would have been having a buddy or my son along, but I had a blast by myself. I stayed till was ready to leave, I walked the swap meet till I felt that I was done, etc. You'll get the picture.........
Good luck with that., Let us know how it turns out.
Rob